MONONGAHELA FORMATION 63 



In the next tier of townships southward exposures are very poor, as 

 the soft calcareous rocks, there predominating, have yielded readily and 

 the shaft records near Washington, 10 miles south from the Cecil line, 

 are the only trustworthy sections. Near the Cecil line the Wa3m.esbiirg 

 is 230 feet above the Pittsburg, but at Washington a record shows that 

 the interval has increased to 274 feet. There the Wa3Tiesburg is but 

 8 inches thick, and all of the other coal beds are wanting to the Pittsr 

 burg. A shaft north from Washington has 3 feet of coal at 21 feet 

 above the Pittsburg and the Uniontown is present at 45 feet below the 

 Waynesburg. The limestones are of noteworthy thielcness. Near Wash- 

 ington the Pishpot is at 70 feet above the 'Pittsburg, and the Benwood 

 is apparently continuous with the Uniontown and Waynesburg in one 

 shalt, where 170 feet of limestone and shale are reported, beginning at 

 11 feet below the Wa3rnesburg coal bed. The imperfect surface ex- 

 posures show that the record is probably not incorrect. About midway 

 in this mass salt water was found in a white limestone. 



Westward the Monongahela is under deep cover for several miles 

 until in Hopewell and Donegal townships one reaches the deep valleys 

 of Brush run and Buffalo creek. There the Waynesburg is exposed, 

 always very poor and, including the clay partings, varying from 2 feet 

 6 inches to almost 7 feet. The Waynesburg limestone makes its appear- 

 ance on Brush run, where it is nodular and 25 feet below the coal; 

 but farther south on Buffalo creek it is a solid bed 3 feet thick, with the 

 Little Waynesburg at 13 feet above it. On these streams the Union- 

 town coal bed is 40 to 65 feet below the Wa5rQesburg and practically 

 rests on the right yellow Uniontown limestone, which is 12 feet thick 

 at one place. In Independence township, north from Donegal along the 

 West Virginia line, Cross creek cuts down to the Pittsburg coal bed. 

 On that stream the Uniontown limestone is 96 feet below the Washington 

 coal bed, 45 feet more than at Eldersville, 5 miles north. It is 6 feet 

 thick and 15 feet above the Benwood limestone, of which 50 feet were 

 seen. The Wa5Tiesburg and Uniontown coal beds are very thin, but 

 the Pittsburg has increased southward in the interval from Eldersville, 

 so that it is 8 feet. 



Southward in Washington and Greene counties the Monongahela be- 

 comes buried more and more deeply under the Dunkard. Little infor- 

 mation can be gleaned from well records, for they are mostly incomplete. 

 Those which are available show that in Greene county the Waynesburg, 

 one Sewickley, and the Pittsburg are the persistent coal beds. Two 

 records in northern Greene give the interval from Waynesburg to Pitts- 



